CN103060814A - Construction method of feeding device for underground pipeline system - Google Patents
Construction method of feeding device for underground pipeline system Download PDFInfo
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- CN103060814A CN103060814A CN2012104084596A CN201210408459A CN103060814A CN 103060814 A CN103060814 A CN 103060814A CN 2012104084596 A CN2012104084596 A CN 2012104084596A CN 201210408459 A CN201210408459 A CN 201210408459A CN 103060814 A CN103060814 A CN 103060814A
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Abstract
The invention discloses a construction method of a feeding device for an underground pipeline system. A special construction system of the feeding device for the underground pipeline system is used to construct. The construction system of the feeding device for the underground pipeline system comprises an outer protection tube (2), a water-proof casing (5), a feeding device (4), a welding device and a grouting device (8). The construction method of the feeding device for the underground pipeline system sequentially comprises the following steps of: I: firstly, drilling from the ground surface (101) of the upper part of outer part of the underground pipeline (1) to the direction of the underground pipeline (1); II: then mounting the hollow outer protection tube (2) in the hole drilled by the above process; and III: mounting the water-proof casing (5); and IV: carrying out remote-controlled welding, then unloading the water-proof casing (5) and adding protective packing at a feeding connector (402) by the grouting device (8) so as to protect the feed connector (402). The construction method of the feeding device for the underground pipeline system is comprehensive in technology, remarkable in effect, convenient to construct and operate and high in technical maturity, and has predictable great economic value and social value.
Description
Technical field
The present invention relates to underground pipeline guard technology field, a kind of underground piping system cathodic protector constructional method is provided especially.
Background technology
In the prior art, adopt heavy caliber steel water-transmission line to have advantages of safety, reliably to reach the construction period short, is common method relatively in the present water delivery engineering.This technique mainly is to carry out the pipeline jacking by operation between working shaft to bury underground, and ground excavation is not carried out on other pipeline approach ground except working shaft.In the prior art, carrying out the underground pipeline protection by means of feeder equipment is a kind of routine techniques scheme, and still, the construction of feeder equipment is one of technological difficulties all the time.
People urgently wish to obtain the good underground piping system of a kind of technique effect cathodic protector constructional method.
Summary of the invention
The purpose of this invention is to provide the good underground piping system of a kind of technique effect cathodic protector constructional method.
Underground piping system feeder equipment constructional method is characterized in that: it uses special underground piping system to carry out the installation of feeder equipment 4 with the feeder equipment construction system; Described underground piping system is constructed as follows with the feeder equipment construction system: outer pillar 2, water string 5, feeder equipment 4, welding plant, cementer 8; Wherein:
Welding plant is used for feed connecting joint 402 and underground pipeline 1 outer wall are welded and fixed together, and it is specially welding gun 6, and it is constructed as follows: electrode grip 601, welding gun bar 602, electric connection line 603; Wherein: electrode grip 601 fixed and arranged are at the front end of welding gun bar 602, and welding gun bar 602 is tubulose, and an end of electric connection line 603 is connecting electrode grip 601, and electric connection line 603 is drawn out to the outside by welding gun bar 602 inner chambers of tubulose;
Described underground piping system satisfies following requirement successively with the feeder equipment constructional method:
1. at first from the earth's surface 101 of the outside top of underground pipeline 1 to the direction boring of underground pipeline 1, bore dia 10～1200mm, the outer wall of the through underground pipeline 1 in this hole but should not destroy underground pipeline 1; Each hole arranges directly over it along underground pipeline 1, and the spacing between each hole is 100-500m;
Then 2. the outer pillar 2 of hollow be installed in the hole that said process gets out, and made the front end of outer pillar 2 touch underground pipeline 1 outer wall and jointly consisted of the tubular cavity of relative closure by outer pillar 2 and underground pipeline 1 outer wall; Outer pillar 2 is specially steel pipe or plastics tubing; Its specification is: intracavity diameter 50-200mm; Outer pillar 2 inside may be filled with some silt 102 contents;
3. descend water string 5: water string 5 is put into outer pillar 2, and make fixed and arranged at the feed connecting joint 402 and underground pipeline 1 outer wall close contact and not mobile of water string 5 front ends, then carry out welding operation;
Described feed connecting joint 402 is arranged on whole water string 5 leading portions, and feed connecting joint 402 front ends are provided with the inner chamber of sealing, and its nose thickness is 0.2-8mm; The front end face of feed connecting joint 402 closed inner chambers is the conical surface, and the cross section of the conical surface reduces and reduces with the front end face of distance feed connecting joint 402; Be fixed with in advance feeder cable 401 on the feed connecting joint 402;
4. remote welding: use welding plant that the metal of the feed connecting joint 402 of water string 5 front ends and underground pipeline 1 partly is welded together to form electrical connection;
5. sacrificial anode 7 constructions: near in advance punching underground pipeline 1, imbed sacrificial anode 7, and by feeder equipment 4 it is electrically connected with underground pipeline 1 formation, and finally consist of the Cathodic protection of underground pipeline system; The arrangement pitch of sacrificial anode 7 is 50-500 rice; Arrange in pairs or single layout.
After remote welding is also qualified, also require to carry out following two kinds of operations:
1. draw off water string 5: after the postwelding detection is qualified, draw off the rest part of water string 5 except feed connecting joint 402 and feeder cable 401; Requirement keep leading portion be welded to connect on underground pipeline 1 feed connecting joint 402 and feeder cable 401 fixed thereon in advance, basset in the upper end of feeder cable 401 so that application afterwards;
2. grouted aggregate concrete: after drawing off water string 5, use cementer 8 to add the protection filler at feed connecting joint 402 places with protection feed connecting joint 402.
Described underground piping system feeder equipment constructional method is characterized in that:
Satisfying following resistivity and welding strength after feed connecting joint 402 and underground pipeline 1 are welded and fixed requires: resistivity requires at 0.1-0.01 ohm; Welding strength requires: use the external force tractive feeder cable 401 of 50-200kg, require can not destroy the welding quality of feed connecting joint 402 and underground pipeline 1;
Also be provided with welding machine in the described welding plant, welding rod 604; For the welded part feed connecting joint 402 that is fixedly installed feeder cable 401 on it; Following structure is linked in sequence into power circuit successively: electric connection line 603, electrode grip 601, welding rod 604, feed connecting joint 402, feeder cable 401, welding machine;
Satisfy following requirement in the process of remote welding: use welding gun 6 and the feeder cable 401 that is fixed in advance on the feed connecting joint 402 consist of the electrical connection loops in order to carry out the remote welding operation, and feed connecting joint 402 and underground pipeline 1 are welded together the formation electrical connection;
The process of welding satisfies following requirement: at first the welding gun 6 of clamping welding rod is sent into water string 5 inside and is made the electrode tip of its front end near the inner chamber front end of feed connecting joint 402, then begin welding, in order to the metal of feed connecting joint 402 and underground pipeline 1 partly is welded together to form electrical connection;
The outside of the feeder cable 401 after the welding extends to the earth's surface always; Feeder cable 401 extends to the physical length on earth's surface should be more than or equal to 110% degree of depth of be used for placing the hole of outer pillar 2;
Described grouting 802 inner chamber and front opening thereof are the wear resistant corrosion resistant structural part.
Described underground piping system feeder equipment constructional method is characterized in that: described underground piping system also satisfies following requirement with the feeder equipment constructional method:
The process of holing to the direction of underground pipeline 1 from the earth's surface of underground pipeline 1 outside top satisfies following requirement: 10～50 meters of hole depths, and corresponding bore dia is 50～250mm, the spacing between each hole is 150-300m;
Boring directly over underground pipeline 1, the axially bored line direction is tried one's best close with underground utilities cross section geometric centre even is overlapped with it;
Boring method: at first above the non-excavating construction pipeline, determine to carry out the point of surface drilling, then carry out drilling operation;
Punching requires: with underground pipeline 1 vertical direction on, this point should be directly over vertical direction.
Described underground piping system feeder equipment constructional method is characterized in that: described underground piping system also satisfies following requirement with the feeder equipment constructional method:
The process of pillar 2 satisfies following requirement outside input and the installation in the hole:
Described underground piping system feeder equipment constructional method is characterized in that: described underground piping system also satisfies following requirement with the feeder equipment constructional method:
Outside installing, also carry out successively following treating processes after the pillar 2 and before putting into water string 5:
1. clear well: during clear well, the cleaning equipment with remote control from outer pillar 2 center cavities is sent to the shaft bottom so that cleaning is positioned at outer pillar 2 inner foreign material near underground pipeline 1 outer walls;
Clear well requires: will affect the silt 102 of welding effect and sewage etc. and clear out of outer pillar 2, and fill this with clear water or air simultaneously and locate near the position to be welded space;
Clear well specifically adopts high pressure water or high-pressure air as working medium; Concrete clear well method satisfies following requirement one or a combination set of: one, near if the soil poor fluidity the underground pipeline 1, the clear well treating method that adopts is: slightly mention outer pillar 2, the requirement for height that improves is 10～100mm, with pressurized air or high pressure water by means of clear well casing 103 from the input of outer pillar 2 upper ends and deliver to the shaft bottom in order to add pressurized air or high pressure water, need pressure at 2 more than the normal atmosphere, silt 102 ejects from the shaft bottom the most at last; Then when keeping pressure, put back to that outer pillar 2 makes it contact with underground pipeline 1 outer wall until outer pillar 2 and underground pipeline 1 close contact, so that the chamber of formation relative closure and can guarantee that outer pillar 2 interior cleanings are beneficial to follow-up welding process and carry out; They are two years old, if removing mud by the shaft bottom is difficult for, then outside guaranteeing, between pillar 2 and the underground pipeline 1 as far as possible in the close contact, pressurized air or high pressure water are upwards ejected mud and finally ejected by well head from outer pillar 2 inside at shaft bottom output squeezing air or high pressure water by the clear well casing 103 that is deep into outer pillar 2 inside; The pressure that pressurized air or high pressure water need requires at 2 more than the normal atmosphere, and outer pillar 2 and underground pipeline 1 outer wall all the time the close contact chamber that forms upper opening are beneficial to clearly well and can stopping that dirt enters in the outer pillar 2 behind clear well;
2. solder joint inspection: the solder joint that will weld between to feeder equipment 4 and underground pipeline 1 after clear well checks in advance, and the particular exam content is to comprise the horizontal situation at protected underground pipeline 1 place and the silt residual volume at feeding point place;
Described underground piping system cathodic protector constructional method is characterized in that: check whether satisfy resistivity and welding strength after remote welding; The qualified requirement of particular exam is: resistivity requires at 0.1-0.01 ohm; Welding strength requires: use the external force tractive feeder cable 401 of 50-200kg, require can not destroy the welding quality of feed connecting joint 402 and underground pipeline 1.
Described underground piping system cathodic protector constructional method is characterized in that:
Described underground piping system cathodic protector constructional method is characterized in that: after grouting, feeder cable 401 is introduced near the controlling box that is arranged on the earth's surface; Then carry out a kind of of following two kinds of operations: one, protecting tube 2 is upwards mentioned a segment distance: 10-50cm, so that silt soil on every side can directly contact with feed connecting joint 402; Its two, direct removal protecting tube 2.
The technology of the present invention is comprehensive, and effect is remarkable, the constructability operation; The present invention is a systems engineering, and the content that relates to is more; Technology maturity is higher, has expected very huge economic worth and social value.
Description of drawings
The present invention is further detailed explanation below in conjunction with drawings and the embodiments:
The present invention is further detailed explanation below in conjunction with drawings and the embodiments:
Fig. 1 is earth's surface positioning principle schematic diagram;
Fig. 2 is for adding the principle of work schematic diagram of outer pillar 2;
Fig. 3 is clear well principle of operation schematic diagram;
Fig. 4 is the solder joint inspection principle schematic;
Fig. 5 is the enlarged view of local structure among Fig. 4, detects near the local structure enlarged view of filling with 301 that is:;
Fig. 6 is the principle schematic that adds water string 5 in the outside pillar 2;
Fig. 7 is the structural representation of water string 5;
Fig. 8 is the structural representation sketch of feed connecting joint 402 in the water string 5;
Fig. 9 is the remote welding principle schematic;
Figure 10 is the structural representation of welding gun 6;
Figure 11 is the weld position partial enlarged drawing of Fig. 9;
Figure 12 is that remote welding checks the principle schematic that whether satisfies resistivity and welding strength requirement afterwards;
Figure 13 is perfusion protection filler principle schematic;
Figure 14 is the partial enlarged drawing of Figure 13 bottom border circular areas;
Figure 15 is the schematic diagram that draws off behind the water string 5;
Figure 16 is after feeder line construction underground part is finished protecting tube 2 is upwards mentioned former
Figure 17 is that feeder equipment 4 is along underground pipeline 1 construction schematic diagram;
Figure 18 is the corrosion schematic diagram of buried steel pipe in soil;
Figure 19 is the principle schematic that sacrificial anode 7 is arranged along underground pipeline 1 both sides by means of feeder equipment 4, and among Figure 19, underground pipeline 1 should be cross section, represents underground pipeline 1 but be reduced to a circular outline;
Figure 20 is the sacrificial anode structure diagram of the section of mediating;
Figure 21 is the local structure schematic diagram with sacrificial anode 7 topmosts one end of auxiliary structure for lifting;
Figure 22 is the right view of Figure 21;
Figure 23 is the current potential-PH figure of steel;
Figure 24 is one of steel pipe piling galvanic protection basic structure schematic diagram.
Embodiment
Underground piping system feeder equipment constructional method, it uses special underground piping system to carry out the installation of feeder equipment 4 with the feeder equipment construction system; Described underground piping system is constructed as follows with the feeder equipment construction system: outer pillar 2, water string 5, feeder equipment 4, welding plant, cementer 8; Wherein:
Welding plant is used for feed connecting joint 402 and underground pipeline 1 outer wall are welded and fixed together, and it is specially welding gun 6, and it is constructed as follows: electrode grip 601, welding gun bar 602, electric connection line 603; Wherein: electrode grip 601 fixed and arranged are at the front end of welding gun bar 602, and welding gun bar 602 is tubulose, and an end of electric connection line 603 is connecting electrode grip 601, and electric connection line 603 is drawn out to the outside by welding gun bar 602 inner chambers of tubulose;
Described underground piping system satisfies following requirement successively with the feeder equipment constructional method:
1. at first from the earth's surface 101 of the outside top of underground pipeline 1 to the direction boring of underground pipeline 1, bore dia 10～1200mm, the outer wall of the through underground pipeline 1 in this hole but should not destroy underground pipeline 1; Each hole arranges directly over it along underground pipeline 1, and the spacing between each hole is 100-500m;
Then 2. the outer pillar 2 of hollow be installed in the hole that said process gets out, and made the front end of outer pillar 2 touch underground pipeline 1 outer wall and jointly consisted of the tubular cavity of relative closure by outer pillar 2 and underground pipeline 1 outer wall; Outer pillar 2 is specially steel pipe or plastics tubing; Its specification is: intracavity diameter 50-200mm; Outer pillar 2 inside may be filled with some silt 102 contents;
3. descend water string 5: water string 5 is put into outer pillar 2, and make fixed and arranged at the feed connecting joint 402 and underground pipeline 1 outer wall close contact and not mobile of water string 5 front ends, then carry out welding operation;
Described feed connecting joint 402 is arranged on whole water string 5 leading portions, and feed connecting joint 402 front ends are provided with the inner chamber of sealing, and its nose thickness is 0.2-8mm; The front end face of feed connecting joint 402 closed inner chambers is the conical surface, and the cross section of the conical surface reduces and reduces with the front end face of distance feed connecting joint 402; Be fixed with in advance feeder cable 401 on the feed connecting joint 402;
4. remote welding: use welding plant that the metal of the feed connecting joint 402 of water string 5 front ends and underground pipeline 1 partly is welded together to form electrical connection;
5. sacrificial anode 7 constructions: near in advance punching underground pipeline 1, imbed sacrificial anode 7, and by feeder equipment 4 it is electrically connected with underground pipeline 1 formation, and finally consist of the Cathodic protection of underground pipeline system; The arrangement pitch of sacrificial anode 7 is 50-500 rice; Arrange in pairs or single layout.
After remote welding is also qualified, also require to carry out following two kinds of operations:
1. draw off water string 5: after the postwelding detection is qualified, draw off the rest part of water string 5 except feed connecting joint 402 and feeder cable 401; Requirement keep leading portion be welded to connect on underground pipeline 1 feed connecting joint 402 and feeder cable 401 fixed thereon in advance, basset in the upper end of feeder cable 401 so that application afterwards;
2. grouted aggregate concrete: after drawing off water string 5, use cementer 8 to add the protection filler at feed connecting joint 402 places with protection feed connecting joint 402.
Described underground piping system feeder equipment constructional method, also satisfy following requirement:
Satisfying following resistivity and welding strength after feed connecting joint 402 and underground pipeline 1 are welded and fixed requires: resistivity requires at 0.1-0.01 ohm; Welding strength requires: use the external force tractive feeder cable 401 of 50-200kg, require can not destroy the welding quality of feed connecting joint 402 and underground pipeline 1;
Also be provided with welding machine in the described welding plant, welding rod 604; For the welded part feed connecting joint 402 that is fixedly installed feeder cable 401 on it; Following structure is linked in sequence into power circuit successively: electric connection line 603, electrode grip 601, welding rod 604, feed connecting joint 402, feeder cable 401, welding machine;
Satisfy following requirement in the process of remote welding: use welding gun 6 and the feeder cable 401 that is fixed in advance on the feed connecting joint 402 consist of the electrical connection loops in order to carry out the remote welding operation, and feed connecting joint 402 and underground pipeline 1 are welded together the formation electrical connection;
The process of welding satisfies following requirement: at first the welding gun 6 of clamping welding rod is sent into water string 5 inside and is made the electrode tip of its front end near the inner chamber front end of feed connecting joint 402, then begin welding, in order to the metal of feed connecting joint 402 and underground pipeline 1 partly is welded together to form electrical connection;
The outside of the feeder cable 401 after the welding extends to the earth's surface always; Feeder cable 401 extends to the physical length on earth's surface should be more than or equal to 110% degree of depth of be used for placing the hole of outer pillar 2;
Described grouting 802 inner chamber and front opening thereof are the wear resistant corrosion resistant structural part.
Described underground piping system also satisfies following requirement with the feeder equipment constructional method:
The process of holing to the direction of underground pipeline 1 from the earth's surface of underground pipeline 1 outside top satisfies following requirement: 10～50 meters of hole depths, and corresponding bore dia is 50～250mm, the spacing between each hole is 150-300m;
Boring directly over underground pipeline 1, the axially bored line direction is tried one's best close with underground utilities cross section geometric centre even is overlapped with it;
Boring method: at first above the non-excavating construction pipeline, determine to carry out the point of surface drilling, then carry out drilling operation;
Punching requires: with underground pipeline 1 vertical direction on, this point should be directly over vertical direction.
The process of pillar 2 satisfies following requirement outside input and the installation in the hole:
Described underground piping system also satisfies following requirement with the feeder equipment constructional method: also carry out successively following treating processes outside installing after the pillar 2 and before putting into water string 5:
1. clear well: during clear well, the cleaning equipment with remote control from outer pillar 2 center cavities is sent to the shaft bottom so that cleaning is positioned at outer pillar 2 inner foreign material near underground pipeline 1 outer walls;
Clear well requires: will affect the silt 102 of welding effect and sewage etc. and clear out of outer pillar 2, and fill this with clear water or air simultaneously and locate near the position to be welded space;
Clear well specifically adopts high pressure water or high-pressure air as working medium; Concrete clear well method satisfies following requirement one or a combination set of: one, near if the soil poor fluidity the underground pipeline 1, the clear well treating method that adopts is: slightly mention outer pillar 2, the requirement for height that improves is 10～100mm, with pressurized air or high pressure water by means of clear well casing 103 from the input of outer pillar 2 upper ends and deliver to the shaft bottom in order to add pressurized air or high pressure water, need pressure at 2 more than the normal atmosphere, silt 102 ejects from the shaft bottom the most at last; Then when keeping pressure, put back to that outer pillar 2 makes it contact with underground pipeline 1 outer wall until outer pillar 2 and underground pipeline 1 close contact, so that the chamber of formation relative closure and can guarantee that outer pillar 2 interior cleanings are beneficial to follow-up welding process and carry out; They are two years old, if removing mud by the shaft bottom is difficult for, then outside guaranteeing, between pillar 2 and the underground pipeline 1 as far as possible in the close contact, pressurized air or high pressure water are upwards ejected mud and finally ejected by well head from outer pillar 2 inside at shaft bottom output squeezing air or high pressure water by the clear well casing 103 that is deep into outer pillar 2 inside; The pressure that pressurized air or high pressure water need requires at 2 more than the normal atmosphere, and outer pillar 2 and underground pipeline 1 outer wall all the time the close contact chamber that forms upper opening are beneficial to clearly well and can stopping that dirt enters in the outer pillar 2 behind clear well;
2. solder joint inspection: the solder joint that will weld between to feeder equipment 4 and underground pipeline 1 after clear well checks in advance, and the particular exam content is to comprise the horizontal situation at protected underground pipeline 1 place and the silt residual volume at feeding point place;
After remote welding, check and whether satisfy resistivity and welding strength; The qualified requirement of particular exam is: resistivity requires at 0.1-0.01 ohm; Welding strength requires: use the external force tractive feeder cable 401 of 50-200kg, require can not destroy the welding quality of feed connecting joint 402 and underground pipeline 1.
After grouting, feeder cable 401 is introduced near the controlling box that is arranged on the earth's surface; Then carry out a kind of of following two kinds of operations: one, protecting tube 2 is upwards mentioned a segment distance: 10-50cm, so that silt soil on every side can directly contact with feed connecting joint 402; Its two, direct removal protecting tube 2.
The present embodiment versatility, effect is remarkable, the constructability operation; The present embodiment is a systems engineering, and the content that relates to is more; Technology maturity is higher, has expected very huge economic worth and social value.
The present embodiment only bores the well that diameter is limited on the earth's surface, avoided adopting digging mode to the destruction of earth's surface facility.At underground pipeline 1 open interior, do not reduced the damage to underground pipeline 1.In addition, can implement the feeder equipment construction and process according to the galvanic protection of feeder equipment 4 for the less underground pipeline of caliber 1.Take this feeder equipment 4 as the basis, can also make up galvanic protection and the Monitoring systems of various ways.
Claims (7)
1. underground piping system feeder equipment constructional method is characterized in that: it uses special underground piping system to carry out the installation of feeder equipment (4) with the feeder equipment construction system; Described underground piping system is constructed as follows with the feeder equipment construction system: outer pillar (2), water string (5), feeder equipment (4), welding plant, cementer (8); Wherein:
Feeder equipment (4) is constructed as follows: feeder cable (401), feed connecting joint (402); The lower end of feeder cable (401) is fixedly connected with and consists of with underground pipeline (1) outer wall by feed connecting joint (402) and is electrically connected, and the other end of feeder cable (401) connects operating device or sacrificial anode;
Outer pillar (2) is arranged in underground pipeline (1) top until in the duct on earth's surface; Lower end contact underground pipeline (1) outer wall of outer pillar (2);
Water string (5) is placed in the outer pillar (2), its front end stationary cloth is equipped with feed connecting joint (402), feed connecting joint (402) and underground pipeline (1) outer wall close contact and mobile are in order to carry out the welding operation between the two of feed connecting joint (402) and underground pipeline (1); Being constructed as follows of water string (5): screw rod (501), muff joint (502), telescopic joint pipe (503), sleeve pipe front tab (504), feed connecting joint (402); Wherein: front four all is hollow tubular structures; Between telescopic joint pipe (503) and the feed connecting joint (402) by sleeve pipe front tab (504), be connected to the one of coaxial line; The upper pre-connection of feed connecting joint (402) has feeder cable (401), screw rod (501) is at least one section, between the different screw rod (501) or/and be connected to the one of coaxial line between screw rod (501) and the telescopic joint pipe (503) by muff joint (502);
Welding plant is used for feed connecting joint (402) and underground pipeline (1) outer wall are welded and fixed together, and it is specially welding gun (6), and it is constructed as follows: electrode grip (601), welding gun bar (602), electric connection line (603); Wherein: electrode grip (601) fixed and arranged is at the front end of welding gun bar (602), welding gun bar (602) is tubulose, one end of electric connection line (603) is connecting electrode grip (601), and electric connection line (603) is drawn out to the outside by welding gun bar (602) inner chamber of tubulose;
Cementer (8) is used for after feed connecting joint (402) and underground pipeline (1) outer wall are welded and fixed, and uses cementer (8) to locate to add the protection filler with protection feed connecting joint (402) at feed connecting joint (402); Described cementer (8) is constructed as follows: grouting bar (801), grouting head (802); Wherein: grouting bar (801) is tubular structure, and grouting head (802) is arranged in grouting bar (801) front end and its front opening;
Described underground piping system satisfies following requirement successively with the feeder equipment constructional method:
1. at first from the earth's surface (101) of the outside top of underground pipeline (1) to the direction boring of underground pipeline (1), bore dia 10～1200mm, this hole go directly underground pipeline (1) outer wall but should not destroy underground pipeline (1); Each hole arranges directly over it along underground pipeline (1), and the spacing between each hole is 100-500m;
Then 2. the outer pillar (2) of hollow be installed in the hole that said process gets out, and made the front end of outer pillar (2) touch underground pipeline (1) outer wall and jointly consisted of the tubular cavity of relative closure by outer pillar (2) and underground pipeline (1) outer wall; Outer pillar (2) is specially steel pipe or plastics tubing; Its specification is: intracavity diameter 50-200mm; Outer pillar (2) inside may be filled with some silts (102) content;
3. descend water string (5): water string (5) is put into outer pillar (2), and make fixed and arranged at the feed connecting joint (402) and underground pipeline (1) outer wall close contact and not mobile of water string (5) front end, then carry out welding operation;
Described feed connecting joint (402) is arranged on the leading portion of whole water string (5), and feed connecting joint (402) front end is provided with the inner chamber of sealing, and its nose thickness is 0.2-8mm; The front end face of feed connecting joint (402) closed inner chamber is the conical surface, and the cross section of the conical surface reduces and reduces with the front end face of distance feed connecting joint (402); Be fixed with in advance feeder cable (401) on the feed connecting joint (402);
4. remote welding: use welding plant that the metal of the feed connecting joint (402) of water string (5) front end and underground pipeline (1) partly is welded together to form electrical connection;
After remote welding is also qualified, also require to carry out following two kinds of operations:
1. draw off water string (5): after the postwelding detection is qualified, draw off the rest part of water string (5) except feed connecting joint (402) and feeder cable (401); Requirement keep leading portion be welded to connect on underground pipeline (1) feed connecting joint (402) and feeder cable (401) fixed thereon in advance, basset in the upper end of feeder cable (401) so that application afterwards;
2. grouting (concrete): after drawing off water string (5), use cementer (8) to locate to add the protection filler with protection feed connecting joint (402) at feed connecting joint (402).
2. according to the described underground piping system of claim 1 feeder equipment constructional method, it is characterized in that:
Satisfying following resistivity and welding strength after feed connecting joint (402) and underground pipeline (1) are welded and fixed requires: resistivity requires at 0.1-0.01 ohm; Welding strength requires: use the external force tractive feeder cable (401) of 50-200kg, require can not destroy the welding quality of feed connecting joint (402) and underground pipeline (1);
Also be provided with welding machine in the described welding plant, welding rod (604); For the welded part feed connecting joint (402) that is fixedly installed feeder cable (401) on it; Following structure is linked in sequence into power circuit successively: electric connection line (603), electrode grip (601), welding rod (604), feed connecting joint (402), feeder cable (401), welding machine;
Satisfy following requirement in the process of remote welding: use welding gun (6) and be fixed in advance feeder cable (401) the formation electrical connection loop on the feed connecting joint (402) so that carrying out remote welding operates, feed connecting joint (402) and underground pipeline (1) are welded together the formation electrical connection;
The process of welding satisfies following requirement: at first the welding gun of clamping welding rod (6) is sent into water string (5) inside and is made the electrode tip of its front end near the inner chamber front end of feed connecting joint (402), then begin welding, in order to the metal of feed connecting joint (402) and underground pipeline (1) partly is welded together to form electrical connection;
The outside of the feeder cable after the welding (401) extends to the earth's surface always; Feeder cable (401) extends to the physical length on earth's surface should be more than or equal to 110% degree of depth of be used for placing the hole of outer pillar (2);
Described grouting head (802) inner chamber and front opening thereof are the wear resistant corrosion resistant structural part.
3. according to the described underground piping system of claim 2 feeder equipment constructional method, it is characterized in that: described underground piping system also satisfies following requirement with the feeder equipment constructional method:
The process of holing to the direction of underground pipeline (1) from the earth's surface of the outside top of underground pipeline (1) satisfies following requirement: 10～50 meters of hole depths, and corresponding bore dia is 50～250mm, the spacing between each hole is 150-300m;
Boring directly over underground pipeline (1), the axially bored line direction is tried one's best close with underground utilities cross section geometric centre even is overlapped with it;
Boring method: at first above the non-excavating construction pipeline, determine to carry out the point of surface drilling, then carry out drilling operation;
Punching requires: with underground pipeline (1) vertical direction on, this point should be directly over vertical direction.
4. according to the described underground piping system of claim 1 feeder equipment constructional method, it is characterized in that: described underground piping system also satisfies following requirement with the feeder equipment constructional method:
The process of pillar (2) satisfies following requirement outside input and the installation in the hole:
Outer pillar (2) is sent in the hole until the front end of outer pillar (2) arrives and touch underground pipeline (1) outer wall; The diameter dimension of outer pillar (2) is from 100～150mm; Outer pillar (2) is steel pipe or plastics tubing, and the pipe end of the outer pillar (2) of contact underground pipeline (1) is fixedly installed the insulated enclosure pad that is useful on buffer protection underground pipeline (1) outer wall;
Outer pillar (2) is segmental structure, is thread joined structure between each section; Outer pillar (2) outside surface after the whole assembling is coated with protective coating.
5. according to the described underground piping system of claim 1 feeder equipment constructional method, it is characterized in that: described underground piping system also satisfies following requirement with the feeder equipment constructional method:
Install outer pillar (2) afterwards with put into water string (5) and also carry out successively before following treating processes:
1. clear well: during clear well, the cleaning equipment with remote control from outer pillar (2) center cavity is sent to the shaft bottom so that cleaning is positioned at the inner foreign material near underground pipeline (1) outer wall of outer pillar (2);
Clear well requires: will affect the silt (102) of welding effect and sewage etc. and clear out of outer pillar (2), and fill this with clear water or air simultaneously and locate near the position to be welded space;
Clear well specifically adopts high pressure water or high-pressure air as working medium; Concrete clear well method satisfies following requirement one or a combination set of: one, near if the soil poor fluidity the underground pipeline (1), the clear well treating method that adopts is: slightly mention outer pillar (2), the requirement for height that improves is 10～100mm, with pressurized air or high pressure water by means of clear well casing (103) from the input of outer pillar (2) upper end and deliver to the shaft bottom in order to add pressurized air or high pressure water, need pressure at 2 more than the normal atmosphere, silt (102) ejects from the shaft bottom the most at last; Then when keeping pressure, put back to that outer pillar (2) makes it to contact with underground pipeline (1) outer wall until outer pillar (2) and underground pipeline (1) close contact, in order to form the chamber of relative closure and can guarantee that the interior cleaning of outer pillar (2) is beneficial to follow-up welding process and carries out; They are two years old, if removing mud by the shaft bottom is difficult for, then when guaranteeing between outer pillar (2) and the underground pipeline (1) as far as possible close contact, pressurized air or high pressure water are upwards ejected mud and finally ejected by well head from outer pillar (2) inside at shaft bottom output squeezing air or high pressure water by the clear well casing (103) that is deep into outer pillar (2) inside; The pressure that pressurized air or high pressure water need requires at 2 more than the normal atmosphere, and outer pillar (2) and underground pipeline (1) outer wall all the time the close contact chamber that forms upper opening are beneficial to clearly well and can stopping that dirt enters in the outer pillar (2) behind clear well;
2. solder joint inspection: the solder joint that will weld between to feeder equipment (4) and underground pipeline (1) after clear well checks in advance, and the particular exam content is to comprise horizontal situation that protected underground pipeline (1) is located and the silt residual volume at feeding point place.
6. according to the described underground piping system of claim 2 cathodic protector constructional method, it is characterized in that: after remote welding, check whether satisfy resistivity and welding strength; The qualified requirement of particular exam is: resistivity requires at 0.1-0.01 ohm; Welding strength requires: use the external force tractive feeder cable (401) of 50-200kg, require can not destroy the welding quality of feed connecting joint (402) and underground pipeline (1).
7. according to the described underground piping system of claim 6 cathodic protector constructional method, it is characterized in that: 9. according to the described underground piping system of claim 7 cathodic protector constructional method, it is characterized in that: after grouting, feeder cable (401) introducing is arranged near the controlling box in earth's surface; Then carry out a kind of of following two kinds of operations: one, protecting tube (2) is upwards mentioned a segment distance: 10-50cm, so that silt soil on every side can directly contact with feed connecting joint (402); Its two, direct removal protecting tube (2).
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| CN201210408459.6A CN103060814B (en) | 2011-10-24 | 2012-10-23 | Construction method of feeding device for underground pipeline system |
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| CN 201220546625 Expired - Lifetime CN202936485U (en) | 2011-10-24 | 2012-10-23 | Feeding device for underground pipeline system |
| CN 201220549904 Expired - Lifetime CN202954092U (en) | 2011-10-24 | 2012-10-23 | Grouting device for installing feeding device of underground pipeline system |
| CN 201220546265 Withdrawn - After Issue CN202936484U (en) | 2011-10-24 | 2012-10-23 | Cathode protection system for underground pipeline system |
| CN201210408459.6A Active CN103060814B (en) | 2011-10-24 | 2012-10-23 | Construction method of feeding device for underground pipeline system |
| CN 201220549886 Expired - Lifetime CN202954095U (en) | 2011-10-24 | 2012-10-23 | Post-welding testing device for feeding device of underground pipeline cathode protection system |
| CN 201220546622 Expired - Lifetime CN202936483U (en) | 2011-10-24 | 2012-10-23 | Waterproof sleeve for cathode protection device for underground pipeline system |
| CN2012104084562A Pending CN103060817A (en) | 2011-10-24 | 2012-10-23 | Feeding device for underground pipeline system |
| CN201210408715.1A Active CN102995026B (en) | 2011-10-24 | 2012-10-23 | Construction method for cathode protection device for underground pipeline system |
| CN 201220546573 Withdrawn - After Issue CN202936487U (en) | 2011-10-24 | 2012-10-23 | Sacrificial anode used for cathodic protection of underground pipeline system |
| CN201210408360.6A Active CN102912354B (en) | 2011-10-24 | 2012-10-23 | Cathode protection system for underground pipeline system |
| CN 201220550014 Expired - Lifetime CN202954093U (en) | 2011-10-24 | 2012-10-23 | Feeding device construction system for underground pipeline system |
| CN201210411455.3A Active CN102995027B (en) | 2011-10-24 | 2012-10-23 | Sacrificial anode for cathode protection of underground pipeline system |
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| CN 201220549904 Expired - Lifetime CN202954092U (en) | 2011-10-24 | 2012-10-23 | Grouting device for installing feeding device of underground pipeline system |
| CN 201220546265 Withdrawn - After Issue CN202936484U (en) | 2011-10-24 | 2012-10-23 | Cathode protection system for underground pipeline system |
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| CN 201220546622 Expired - Lifetime CN202936483U (en) | 2011-10-24 | 2012-10-23 | Waterproof sleeve for cathode protection device for underground pipeline system |
| CN2012104084562A Pending CN103060817A (en) | 2011-10-24 | 2012-10-23 | Feeding device for underground pipeline system |
| CN201210408715.1A Active CN102995026B (en) | 2011-10-24 | 2012-10-23 | Construction method for cathode protection device for underground pipeline system |
| CN 201220546573 Withdrawn - After Issue CN202936487U (en) | 2011-10-24 | 2012-10-23 | Sacrificial anode used for cathodic protection of underground pipeline system |
| CN201210408360.6A Active CN102912354B (en) | 2011-10-24 | 2012-10-23 | Cathode protection system for underground pipeline system |
| CN 201220550014 Expired - Lifetime CN202954093U (en) | 2011-10-24 | 2012-10-23 | Feeding device construction system for underground pipeline system |
| CN201210411455.3A Active CN102995027B (en) | 2011-10-24 | 2012-10-23 | Sacrificial anode for cathode protection of underground pipeline system |
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| CN202936485U (en) * | 2011-10-24 | 2013-05-15 | 中国科学院金属研究所 | Feeding device for underground pipeline system |
| CN103273193A (en) * | 2013-06-07 | 2013-09-04 | 北京市燃气集团有限责任公司 | Long-bar type sacrificial anode welding tool and application method thereof |
| DE102013212725A1 (en) * | 2013-06-28 | 2014-12-31 | Ksb Aktiengesellschaft | Fluid-carrying system with cathodic corrosion protection |
| CN103982752A (en) * | 2014-05-14 | 2014-08-13 | 中工武大设计研究有限公司 | Dual side interaction cathode protection method for PCCP (prestressed concrete cylinder pipe) |
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| CN105822830A (en) * | 2016-03-31 | 2016-08-03 | 中国水利水电第十四工程局有限公司 | In-situ suspension protection construction method of high-pressure gas pipe longitudinally spanning over foundation pit |
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| CN108595850B (en) * | 2018-04-27 | 2022-04-05 | 中国石油天然气集团有限公司 | Method for calculating cathodic protection length of parallel pipeline under forced current system |
| CN109136938B (en) * | 2018-07-23 | 2020-07-14 | 北京中冶和坤天冕工程技术有限公司 | Cathodic protection and corrosion prevention method for underground pipeline |
| CN108759779A (en) * | 2018-08-31 | 2018-11-06 | 广东省源天工程有限公司 | A kind of underground pipeline settlement monitoring device and preparation method thereof |
| CN109256726B (en) * | 2018-11-22 | 2020-06-16 | 陕西陕煤铜川矿业有限公司 | Cable laying method for vertically laying pipeline |
| CN109855166B (en) * | 2018-12-12 | 2022-02-22 | 北京金旗舰暖通科技有限公司 | Anti-corrosion radiator |
| CN111946298B (en) * | 2020-08-05 | 2022-08-05 | 中国石油天然气股份有限公司 | Anticorrosion technology for internally pasting anode in high corrosion section under oil well pump |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN103060814B (en) | 2014-12-10 |
| CN102912354B (en) | 2014-10-22 |
| CN202954092U (en) | 2013-05-29 |
| CN102995027A (en) | 2013-03-27 |
| CN202936487U (en) | 2013-05-15 |
| CN202936483U (en) | 2013-05-15 |
| CN102995026B (en) | 2014-12-10 |
| CN202936484U (en) | 2013-05-15 |
| CN102995026A (en) | 2013-03-27 |
| CN102912354A (en) | 2013-02-06 |
| CN103060817A (en) | 2013-04-24 |
| CN202954093U (en) | 2013-05-29 |
| CN202936485U (en) | 2013-05-15 |
| CN202954095U (en) | 2013-05-29 |
| CN102995027B (en) | 2015-06-10 |
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